Military members operate within situations and environments that most people never experience. They must be superbly trained, physically fit, and emotionally strong and are burdened with a degree of responsibility and risk found in few other occupations. The discipline of military psychology involves the systematic and scientific study of the selection, training, adaptation, and performance of soldiers. Military psychology, by necessity, is a heterogeneous field of inquiry. On the one hand, it draws on all subdisciplines of psychology to understand the variables that affect soldier...